Phase Diagram of Interacting Composite Fermions in the Bilayer [Formula presented] Quantum Hall Effect

N. Kumada, D. Terasawa, Y. Shimoda, H. Azuhata, A. Sawada, Z. F. Ezawa, K. Muraki, T. Saku, Y. Hirayama

Research output: Contribution to journalArticlepeer-review

Abstract

We study the phase diagram of composite fermions (CFs) in the presence of spin and pseudospin degrees of freedom in the bilayer [Formula presented] quantum Hall (QH) state. Activation studies elucidate the existence of three different QH states with two different types of hysteresis in the magnetotransport. While a noninteracting CF model provides a qualitative account of the phase diagram, the observed renormalization of tunneling gap and a non-QH state at high densities are not explained in the noninteracting CF model, and are suggested to be manifestations of interactions between CFs.

Original languageEnglish
JournalPhysical review letters
Volume89
Issue number11
DOIs
Publication statusPublished - 2002

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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